I replied to your question immediately after you had posted it, on 3 October 2019.
Did you fall into a time hole since then?
Anyway, to answer your new question, I'm afraid it's not possible to hide/remove the Show Solution button at the end of a H5P Quiz. This well-known bug (or "missing feature") was reported on April 18, 2017 here: https://h5ptechnology.atlassian.net/browse/HFP-956
Since it was classified as "Priority: Medium", it has still not been fixed.
For questions that are actually related to H5P and not to Moodle, I suggest you post them to the H5P forum rather than here.
Sorry about that and noted for your recommended.